4 ms·

This is already happening on a large scale (but not yet being revealed to the victims) thanks to testing for inheritable diseases. https://www.telegraph.co.uk/

• Merrill 7y ago
  >It is currently estimated that around 4 per cent of the population are unaware the man they call their father is not their true biological relative. That is for the UK. It may vary a lot by ethnoreligious and socioeconomic groups in different countries.